Malicious PDF — malware analysis report

Static analysis result for SHA-256 e069d95c07c2c1f3…

MALICIOUS

PDF

42.8 KB Created: 2020-11-07 05:27:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: abe1bf64fd82496d24ad5d8b54239fb1 SHA-1: bf0edfabcc7393fece373c9d0aab921f994eaa90 SHA-256: e069d95c07c2c1f3862024abccea6c7a1efb19d9bd8d4bdfa93966568fab4983
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains a lure to install a browser extension or update, a common tactic for malware delivery. It also includes a link to a known malicious redirector infrastructure, suggesting an attempt to download a second-stage payload. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/123?keyword=showbox+apk+for+pc+download In PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/welajeta.pdfIn PDF document text
    • https://bisawovetazevel.weebly.com/uploads/1/3/4/6/134613631/vuvosekojuzimuta.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/7295759.pdfIn PDF document text
    • https://wilubowedawiwo.weebly.com/uploads/1/3/4/5/134528918/867318.pdfIn PDF document text
    • https://rovemijiv.weebly.com/uploads/1/3/4/3/134343091/d2fa4ddc23c4.pdfIn PDF document text
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/wokowawa-sizoxamuvipo.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/ranerilin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xarojapi/answers_to_dollar_general_assessment_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bc9f8c-259a-426a-b4e9-b882a9ffee4b/waxofaxafaperumujunujaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640caf48-c9b8-4079-8d32-e5bc561611fe/worksheet_10_eukaryotic_cell_structure_and_organelles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12fc9a6e-fea1-47ac-9416-620cb44547bf/mark_of_the_beast_chip_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39136790-f148-4207-86f6-1768ada64d8c/xonudaveroredimome.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/41037095361.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/fonizovukusobamudefowi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6750 5532 bytes
SHA-256: 53dfe2389818b3443804079fa0ab063e22c2b3ebb47a857633382e320ff4ba6f
font_01_sfnt_off00007a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2D 10612 bytes
SHA-256: 4fc6e084ed5fb17aaef2f7abe5075d9cab49a259fec981be7689d03f79707fa2

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